splodge Posted March 23, 2023 Share Posted March 23, 2023 Gravity keeps our feet firmly on the ground but what force causes thermal energy and light to travel through space ? Is it a second type of gravity ? Link to comment Share on other sites More sharing options...
exchemist Posted March 23, 2023 Share Posted March 23, 2023 25 minutes ago, splodge said: Gravity keeps our feet firmly on the ground but what force causes thermal energy and light to travel through space ? Is it a second type of gravity ? No, it's the electromagnetic interaction. Link to comment Share on other sites More sharing options...
splodge Posted March 23, 2023 Author Share Posted March 23, 2023 (edited) 9 minutes ago, exchemist said: No, it's the electromagnetic interaction. Is that even an answer ? What do you mean by this ? I have a cup of coffee infront of me , the thermal energy temporally conserved by the liquid and cup will eventually dissipate into the space . Please explain what force does the work in this process ? Gravity is an attractive force and thermal energy travels the opposite direction to gravity , outward bound ! Electromagnetic interaction ? Interaction with what ? Edited March 23, 2023 by splodge Link to comment Share on other sites More sharing options...
exchemist Posted March 23, 2023 Share Posted March 23, 2023 (edited) 4 minutes ago, splodge said: Is that even an answer ? What do you mean by this ? I have a cup of coffee infront of me , the thermal energy temporally conserved by the liquid and cup will eventually dissipate into the space . Please explain what force does the work in this process ? Gravity is an attractive force and thermal energy travels the opposite direction to gravity , outward bound ! Yes, it's an answer. Bye. 😄 Edited March 23, 2023 by exchemist Link to comment Share on other sites More sharing options...
swansont Posted March 23, 2023 Share Posted March 23, 2023 3 hours ago, splodge said: I have a cup of coffee infront of me , the thermal energy temporally conserved by the liquid and cup will eventually dissipate into the space . Please explain what force does the work in this process ? It’s not temporarily conserved, and there is no force involved. Heat flow spontaneously happening from hot to cold is a basic idea in thermodynamics. Link to comment Share on other sites More sharing options...
Bufofrog Posted March 23, 2023 Share Posted March 23, 2023 3 hours ago, splodge said: Gravity keeps our feet firmly on the ground but what force causes thermal energy and light to travel through space ? Both light and thermal energy that travels through space are electromagnetic waves (photons). There is no force that causes photons to move, a photon is a massless particle and can only move at c in a vacuum. 3 hours ago, splodge said: Gravity is an attractive force and thermal energy travels the opposite direction to gravity , outward bound ! Thermal energy does not only travel in the opposite direction of gravity. A cup of hot coffee would radiate thermal energy 360 degrees. Link to comment Share on other sites More sharing options...
Sensei Posted March 24, 2023 Share Posted March 24, 2023 (edited) 13 hours ago, splodge said: Electromagnetic interaction ? Interaction with what ? One particle colliding with another particle gives up some of its kinetic energy. 1st one is decelerated, 2nd one is accelerated. Typical interactions: photon-electron, photon-proton/nucleus, electron-electron, electron-proton. YouTube animation showing the interactions of photons with matter: Edited March 24, 2023 by Sensei Link to comment Share on other sites More sharing options...
splodge Posted March 24, 2023 Author Share Posted March 24, 2023 (edited) 21 hours ago, Bufofrog said: Thermal energy does not only travel in the opposite direction of gravity. A cup of hot coffee would radiate thermal energy 360 degrees. The thermal energy radiates 360 degrees outwards bound , a +ve vector . Gravity attracts things in a -ve vector manner . (-ve and +ve mean negative and positive respectively. They are often used in science laboratory notebook shorthand) ''Thermal energy does not only travel in the opposite direction of gravity'' I disagree with your statement based on centripetal versus centrifugal ! 22 hours ago, swansont said: It’s not temporarily conserved, and there is no force involved. Heat flow spontaneously happening from hot to cold is a basic idea in thermodynamics. Hot → Cold is indeed very basic thermodynamics that doesn't explain any intricate details of how Hot → Cold occurs . Why not a second type of gravity Hot → Gravity 2 ? The difference in gravity one and gravity 2 is that gravity two is ''centrifugal'' a +ve vector from the source of heat . Edited March 24, 2023 by splodge Link to comment Share on other sites More sharing options...
swansont Posted March 24, 2023 Share Posted March 24, 2023 1 hour ago, splodge said: Hot → Cold is indeed very basic thermodynamics that doesn't explain any intricate details of how Hot → Cold occurs . Why not a second type of gravity Hot → Gravity 2 ? Saying “gravity2” doesn’t explain it, so that’s hardly a valid objection. Newtonian gravity is an attraction of masses with an inverse-square dependence on distance. Heat flow does not behave that way. Why not? Because you haven’t given any legitimate reason to adopt such a model. Link to comment Share on other sites More sharing options...
splodge Posted March 24, 2023 Author Share Posted March 24, 2023 2 minutes ago, swansont said: Saying “gravity2” doesn’t explain it, so that’s hardly a valid objection. Newtonian gravity is an attraction of masses with an inverse-square dependence on distance. Heat flow does not behave that way. Why not? Because you haven’t given any legitimate reason to adopt such a model. Newtonian gravity is an attraction of masses and heat flow does not behave that way. Newton said every action has an opposite reaction and heat flows the opposite direction of gravity which is a reason to suggest a second type of gravity could possibably exist . A second type of gravity that dissipates heat could explain heats motion . You said hot to cold , there must be a mechanism that allows for this process ? Link to comment Share on other sites More sharing options...
swansont Posted March 24, 2023 Share Posted March 24, 2023 5 minutes ago, splodge said: Newtonian gravity is an attraction of masses and heat flow does not behave that way. So why call heat flow gravity 2? 5 minutes ago, splodge said: Newton said every action has an opposite reaction and heat flows the opposite direction of gravity which is a reason to suggest a second type of gravity could possibably exist . Heat flow is independent of gravity. It can flow in the opposite direction, it can flow perpendicular to it, it can flow in the same direction. 5 minutes ago, splodge said: A second type of gravity that dissipates heat could explain heats motion . You’ve explained nothing with your idea. 5 minutes ago, splodge said: You said hot to cold , there must be a mechanism that allows for this process ? Heat flow can be from conduction, convection or radiation. It’s not a single mechanism. Link to comment Share on other sites More sharing options...
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